The reliability of a maximal isometric hip strength and simultaneous surface EMG screening protocol in elite, junior rugby league athletes

Paula Charlton; Benjamin Mentiplay; A Grimaldi; Yong-Hao Pua; Ross Clark

doi:10.1016/j.jsams.2016.06.008

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The reliability of a maximal isometric hip strength and simultaneous surface EMG screening protocol in elite, junior rugby league athletes

Journal article

Peer reviewed

The reliability of a maximal isometric hip strength and simultaneous surface EMG screening protocol in elite, junior rugby league athletes

Paula Charlton, Benjamin Mentiplay, A Grimaldi, Yong-Hao Pua and Ross Clark

Journal of Science and Medicine in Sport, Vol.20(2), pp.139-145

2017

DOI: https://doi.org/10.1016/j.jsams.2016.06.008

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Abstract

athletes

gluteal muscle

hip

hip muscle

muscle strength

sports

Objectives: Firstly to describe the reliability of assessing maximal isometric strength of the hip abductor and adductor musculature using a hand held dynamometry (HHD) protocol with simultaneous wireless surface electromyographic (sEMG) evaluation of the gluteus medius (GM) and adductor longus (AL). Secondly, to describe the correlation between isometric strength recorded with the HHD protocol and a laboratory standard isokinetic device. Design: Reliability and correlational study. Methods: A sample of 24 elite, male, junior, rugby league athletes, age 16-20 years participated in repeated HHD and isometric Kin-Com (KC) strength testing with simultaneous sEMG assessment, on average (range) 6 (5-7) days apart by a single assessor. Strength tests included; unilateral hip abduction (ABD) and adduction (ADD) and bilateral ADD assessed with squeeze (SQ) tests in 0 and 45 of hip flexion. Results: HHD demonstrated good to excellent inter-session reliability for all outcome measures (ICC(2,1) =0.76-0.91) and good to excellent association with the laboratory reference KC (ICC(2,1) =0.80-0.88). Whilst intra-session, inter-trial reliability of EMG activation and co-activation outcome measures ranged from moderate to excellent (ICC(2,1) =0.70-0.94), inter-session reliability was poor (all ICC(2,1) <0.50). Conclusions: Isometric strength testing of the hip ABD and ADD musculature using HHD may be measured reliably in elite, junior rugby league athletes. Due to the poor inter-session reliability of sEMG measures, it is not recommended for athlete screening purposes if using the techniques implemented in this study. © 2016 Sports Medicine Australia.

Details

Title: The reliability of a maximal isometric hip strength and simultaneous surface EMG screening protocol in elite, junior rugby league athletes
Authors: Paula Charlton (Author) - Australian Institute of Sport
Benjamin Mentiplay (Author) - Australian Catholic University
A Grimaldi (Author) - University of Queensland
Yong-Hao Pua (Author) - Singapore General Hospital
Ross Clark (Author) - Australian Catholic University
Publication details: Journal of Science and Medicine in Sport, Vol.20(2), pp.139-145
Publisher: Elsevier Australia
Date published: 2017
DOI: 10.1016/j.jsams.2016.06.008
ISSN: 1440-2440
Organisation Unit: University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health and Behavioural Sciences - Legacy; School of Health - Public Health
Language: English
Record Identifier: 99450479202621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Sport Sciences